3. Resin control and characterization

3.1 Control

Controlling a few properties essentially ensures that resins are manufactured consistently.

Control methods are usually standardized .

• Color

  Measurements are made either :

  • with the Lovibond colorimeter;

  • Gardner colorimeter;

  • Hazen coloring (NF T 20-605).

• Acid value (NF EN ISO 2114-00)

  The quantity of $\mathrm{COOH}$ remaining...